It is best to let your loved ones collect the money themselves. Because, legally, collecting money on behalf of someone is an agency act, and the agency must have a power of attorney. How can you prove that you have the right to collect it on your behalf without evidence? If you write your name, you will be responsible. Therefore, your relative should write a power of attorney to you, or just a note, authorizing you to collect money on his behalf. In this way, you can write the collector: XXX on the receipt. If there is any dispute, you will have proof.